/*
 * Copyright (c) 2015, 2017 Oracle and/or its affiliates. All rights reserved. This
 * code is released under a tri EPL/GPL/LGPL license. You can use it,
 * redistribute it and/or modify it under the terms of the:
 *
 * Eclipse Public License version 1.0
 * GNU General Public License version 2
 * GNU Lesser General Public License version 2.1
 *
 * This file contains configuration values translated from Rubinius.
 *
 * Copyright (c) 2007-2014, Evan Phoenix and contributors
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * * Neither the name of Rubinius nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.truffleruby.platform;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.object.DynamicObject;

public class NativeConfiguration {

    public static final String PREFIX = "platform.";

    private final Map<String, Object> configuration = new HashMap<>(); // Only written to by create() once per RubyContext.

    public void config(String key, Object value) {
        configuration.put(key, value);
    }

    @TruffleBoundary
    public Object get(String key) {
        return configuration.get(key);
    }

    @TruffleBoundary
    public Collection<Entry<String, Object>> getSection(String section) {
        final Collection<Entry<String, Object>> entries = new ArrayList<>();

        for (Entry<String, Object> entry : configuration.entrySet()) {
            if (entry.getKey().startsWith(section)) {
                entries.add(entry);
            }
        }

        return entries;
    }

    @TruffleBoundary
    public Collection<DynamicObject> dynamicObjectValues() {
        final Collection<Object> values = configuration.values();
        final ArrayList<DynamicObject> objects = new ArrayList<>(values.size());
        for (Object value : values) {
            if (value instanceof DynamicObject) {
                objects.add((DynamicObject) value);
            }
        }
        return objects;
    }

}
